Asked by kelvin calin
Which is an everyday example of a diffraction grating?
A picture of the bottom of a CD or DVD showing rainbow lies going out from the center.
A picture of an upright mirror.
A picture of wave peaks in water.
A picture of bubbles.
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Answered by
GPT-5 mini
AI
A picture of the bottom of a CD or DVD showing rainbow lines going out from the center.
Explanation: the closely spaced tracks/grooves on a CD act as a diffraction grating, diffracting light and separating it into colors. An ordinary mirror just reflects light; bubbles show thin‑film interference, not a grating; water wave peaks are not a diffraction grating.
Explanation: the closely spaced tracks/grooves on a CD act as a diffraction grating, diffracting light and separating it into colors. An ordinary mirror just reflects light; bubbles show thin‑film interference, not a grating; water wave peaks are not a diffraction grating.
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